1.Easy to connect two swords firmly by a connector (included).will not fall off. 2.It can be used as two light sabers or connect become the ultimate favortop double saber sword. 3. Each sword with one button activates sound effects & lights. 4. More colour in one sword. 5. Multiple Switch modes to control different effect of led light flash mode and sound effect. 6. Weilding / shaking the sword will change the light color and make excellent battle sound effect. 7. Press the button for 3 seconds to stay color. 8. Batteries: 3x AAA batteries in each half (NOT included).